IC: add destination dir to start of classpath instead of end

Otherwise IC fails when a project declares a class with the same name
as in one of its dependencies.
The issue is relevant only for non-JPS IC (Gradle, Maven, etc.),
but I added the test for JPS too.

  #KT-20516 fixed

jps-plugin/testData/incremental/multiModule/duplicatedClass/module2_utils.kt

@@ -0,0 +1 @@
+fun buzz() {}